from django.http import HttpResponse
from django.shortcuts import render
from django.template.loader import render_to_string
import random
import io
# 引入绘图模块
from PIL import Image, ImageDraw, ImageFont

from .models import *


def index(request):
    heros = HeroInfo.objects.filter(isDelete=False)
    context = {'heros':heros}
    #render_to_string('booktest/index.html') #加载模型文件返回一个字符串模板内容
    return render(request,'booktest/index.html',context)

def show(request,id,id1):
    context = {'id':id}
    return render(request,'booktest/show.html',context)

def index2(request):
    return render(request,'booktest/index2.html')

def testhtml(request):
    context = {'t1':'<h1>tree</h1>'}
    return render(request,'booktest/testhtml.html',context)

def verfycode(request):
    # 定义变量，用于画面的背景色、宽、高
    bgcolor = (random.randrange(20, 100),random.randrange(
        20, 100), 255)
    width = 100
    height = 25
    # 创建画面对象
    im = Image.new('RGB', (width, height), bgcolor)
    # 创建画笔对象
    draw = ImageDraw.Draw(im)
    # 调用画笔的point()函数绘制噪点
    for i in range(0, 100):
        xy = (random.randrange(0, width), random.randrange(0, height))
        fill = (random.randrange(0, 255), 255, random.randrange(0, 255))
        draw.point(xy, fill=fill)
    # 定义验证码的备选值
    str1 = 'ABCD123EFGHIJK456LMNOPQRS789TUVWXYZ0'
    # 随机选取4个值作为验证码
    rand_str = ''
    for i in range(0, 4):
        rand_str += str1[random.randrange(0, len(str1))]
    # 构造字体对象
    font = ImageFont.truetype("C:\Windows\Fonts\simsunb.ttf",20)
    # 构造字体颜色
    fontcolor = (255, random.randrange(0, 255), random.randrange(0, 255))
    # 绘制4个字
    draw.text((5, 2), rand_str[0], font=font, fill=fontcolor)
    draw.text((25, 2), rand_str[1], font=font, fill=fontcolor)
    draw.text((50, 2), rand_str[2], font=font, fill=fontcolor)
    draw.text((75, 2), rand_str[3], font=font, fill=fontcolor)
    # 释放画笔
    del draw
    # 存入session，用于做进一步验证
    request.session['verifycode'] = rand_str
    # 内存文件操作
    buf = io.BytesIO()
    # 将图片保存在内存中，文件类型为png
    im.save(buf, 'png')
    # 将内存中的图片数据返回给客户端，MIME类型为图片png
    return HttpResponse(buf.getvalue(), 'image/png')

def verfytest(request):
    return render(request,'booktest/verify.html')

def verfyvilid(request):
    formcode = request.POST.get('code')
    sessioncode = request.session.get('verifycode')
    if formcode.upper() == sessioncode:
        text = 'ok'
    else:
        text = 'no'
    return HttpResponse(text)